#include <iostream>
#include <fstream>
#include "contacts.pb.h"

using namespace std;
using namespace contacts;

/**
 * 打印联系人列表
*/
void PrintContacts(const Contacts& contacts)
{
    for(int i = 0; i < contacts.contacts_size(); ++i)
    {
        const PeopleInfo& people = contacts.contacts(i);
        cout << "-------- 联系人 " << i + 1 << " --------" << endl;
        cout << "姓名：" << people.name() << endl;
        cout << "年龄：" << people.age() << endl;
        int j = 1;
        for(const PeopleInfo_Phone& phone : people.phone())
        {
            cout << "电话 " << j++ << "：" << phone.number() << endl; 
        }
        cout << "--------------------------" << endl;
    }
}

// demo2：认识 repeated 字段，并将联系人信息输出到文件中
int main(int argc, char** argv)
{
    if(argc != 2)
    {
        cerr << "Usage: " << argv[0] << " CONTACTS_FILE" << endl;
        return -1;
    }

    // 以二进制的方式读取 contacts
    Contacts contacts;
    fstream input(argv[1], ios::in | ios::binary);
    if(!contacts.ParseFromIstream(&input))
    {
        cerr << "Failed to parse contacts." << endl;
        input.close();
        return -1;
    }

    // 打印 contacts
    PrintContacts(contacts);

    input.close();
    google::protobuf::ShutdownProtobufLibrary();

    return 0;
}